# mode: run
# tag: coverage,trace

"""
PYTHON setup.py build_ext -i
PYTHON -m coverage run --source=src coverage_test.py
PYTHON collect_coverage.py
"""

######## setup.py ########

from distutils.core import setup
from Cython.Build import cythonize

setup(ext_modules = cythonize([
    'src/trivial_module.pyx',
]))


######## .coveragerc ########
[run]
plugins = Cython.Coverage


######## src/trivial_module.pyx ########
# cython: linetrace=True
# distutils: define_macros=CYTHON_TRACE=1

def func1(int a, int b):
    cdef int x = 1      #  5
    c = func2(a) + b    #  6
    return x + c        #  7


def func2(int a):
    return a * 2        # 11


######## coverage_test.py ########

import os.path
import trivial_module


assert not any(
    trivial_module.__file__.endswith(ext)
    for ext in '.py .pyc .pyo .pyw .pyx .pxi'.split()
), module.__file__


def run_coverage(module):
    assert module.func1(1, 2) == (1 * 2) + 2 + 1
    assert module.func2(2) == 2 * 2


if __name__ == '__main__':
    run_coverage(trivial_module)


######## collect_coverage.py ########

import re
import sys
import os
import os.path
import subprocess
from glob import iglob


def run_coverage_command(*command):
    env = dict(os.environ, LANG='', LC_ALL='C')
    process = subprocess.Popen(
        [sys.executable, '-m', 'coverage'] + list(command),
        stdout=subprocess.PIPE, env=env)
    stdout, _ = process.communicate()
    return stdout


def run_report():
    stdout = run_coverage_command('report', '--show-missing')
    stdout = stdout.decode('iso8859-1')  # 'safe' decoding
    lines = stdout.splitlines()
    print(stdout)

    module_path = 'trivial_module.pyx'
    assert any(module_path in line for line in lines), (
        "'%s' not found in coverage report:\n\n%s" % (module_path, stdout))

    files = {}
    line_iter = iter(lines)
    for line in line_iter:
        if line.startswith('---'):
            break
    extend = [''] * 2
    for line in line_iter:
        if not line or line.startswith('---'):
            continue
        name, statements, missed, covered, _missing = (line.split(None, 4) + extend)[:5]
        missing = []
        for start, end in re.findall('([0-9]+)(?:-([0-9]+))?', _missing):
            if end:
                missing.extend(range(int(start), int(end)+1))
            else:
                missing.append(int(start))
        files[os.path.basename(name)] = (statements, missed, covered, missing)

    assert  5 not in files[module_path][-1], files[module_path]
    assert  6 not in files[module_path][-1], files[module_path]
    assert  7 not in files[module_path][-1], files[module_path]
    assert 11 not in files[module_path][-1], files[module_path]


def run_xml_report():
    stdout = run_coverage_command('xml', '-o', '-')
    print(stdout)

    import xml.etree.ElementTree as etree
    data = etree.fromstring(stdout)

    files = {}
    for module in data.iterfind('.//class'):
        files[module.get('filename').replace('\\', '/')] = dict(
            (int(line.get('number')), int(line.get('hits')))
            for line in module.findall('lines/line')
        )

    module_path = 'src/trivial_module.pyx'

    assert files[module_path][5] > 0, files[module_path]
    assert files[module_path][6] > 0, files[module_path]
    assert files[module_path][7] > 0, files[module_path]
    assert files[module_path][11] > 0, files[module_path]


def run_html_report():
    from collections import defaultdict

    stdout = run_coverage_command('html', '-d', 'html')
    # coverage 6.1+ changed the order of the attributes => need to parse them separately
    _parse_id = re.compile(r'id=["\'][^0-9"\']*(?P<id>[0-9]+)[^0-9"\']*["\']').search
    _parse_state = re.compile(r'class=["\'][^"\']*(?P<state>mis|run|exc)[^"\']*["\']').search

    files = {}
    for file_path in iglob('html/*.html'):
        with open(file_path) as f:
            page = f.read()
        report = defaultdict(set)
        for line in re.split(r'id=["\']source["\']', page)[-1].splitlines():
            lineno = _parse_id(line)
            state = _parse_state(line)
            if not lineno or not state:
                continue
            report[state.group('state')].add(int(lineno.group('id')))
        files[file_path] = (report['run'], report['mis'])

    executed, missing = [data for path, data in files.items() if 'trivial_module' in path][0]
    assert executed
    assert 5 in executed, executed
    assert 6 in executed, executed
    assert 7 in executed, executed
    assert 11 in executed, executed


if __name__ == '__main__':
    run_report()
    run_xml_report()
    run_html_report()